Reconciliation of Operating Profit (Loss) from Segments to Consolidated (Details) (USD $)	3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended			154 Months Ended	157 Months Ended	160 Months Ended	163 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2012	Jun. 30, 2012	Sep. 30, 2012	Dec. 31, 2012
Net Loss Attributable to the Company	$ (5,607,295)	$ (8,452,231)	$ (7,774,914)	$ (16,227,145)	$ (21,834,440)	$ (28,974,449)	$ (24,873,633)	$ (14,599,983)	$ (116,091,682)	$ (124,543,912)	$ (130,151,207)	$ (137,291,216)
Interest revenue						42,407	79,165	52,290				2,061,331
Depreciation						(241,610)	(215,740)	(200,266)				(1,035,035)
Accretion						(49,899)	(2,518)	0				(52,417)
Arkose [Member]
Net Loss Attributable to the Company						(875,466)	(1,332,722)	(1,594,875)
Interest revenue						293	386	938
Depreciation						0	0	0
Accretion							0
Uranerz [Member]
Net Loss Attributable to the Company						(28,098,983)	(23,540,911)	(13,005,108)
Interest revenue						42,114	78,779	51,352
Depreciation						(241,610)	(215,740)	(200,266)
Accretion							$ (2,518)